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描述 | Many of the tyrosine kinase enzymes which are early components of the growth signal transduction pathway in mammalian cells are encoded by proto-oncogenes, and their transformation or overexpression has been shown to occur in a large percentage of clinical cancers. The epidermal growth factor receptor (EGFR), one of the tyrosine kinase enzymes, has thus become important target for cancer therapy [1]. AG-494 is capable of selectively inhibiting the EGFR tyrosine kinase activity in vitro as compared to a variety of tyrosine kinases, including the closely related HER-2/Neu receptor in the cell-free kinase assay. AG-494 inhibits autophosphorylation of EGFR with IC50 value of 1.1 ± 0.24 μM. AG-494 inhibits 50% of TPA (phorbol ester)- and LPA (lysophosphatidic acid)-dependent [3H]thymidine uptake at ~5 μM, whereas EGF-dependent [3H]thymidine uptake is inhibited at ~10.5 μM. These results imply that AG-494 exerts its antimitogenic effect by inhibiting a signal transduction element downstream of the EGFR [2]. EGF potentiates BMP9-induced early and late osteogenic markers of mesenchymal stem cells (MSCs), which can be effectively inhibited by AG-494 [3]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
3.57mL 0.71mL 0.36mL |
17.84mL 3.57mL 1.78mL |
35.68mL 7.14mL 3.57mL |
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